From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BFFFB3C9ED5 for ; Wed, 15 Jul 2026 11:16:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784114184; cv=none; b=tn3GzVJtFDMyHHrbdV9gUYXecALK02FVgAg9NL6NSN5AyzwhxBe5xsJpp4kScMSKA+cPUc9C2N8OscfZZ9XkZ0Gw0VpkWlKbLosqvV2sgYqJa1fOT+dtqQRL6JvhMnI3NL/pDAP+5uyqAEM93auQ1oVLLiD/kULh4dp8/w6H4Xo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784114184; c=relaxed/simple; bh=cVLqm49OVUnlyTOiFyiMpK7BklkguM3f9/DMUEvc9MI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=mrKeDJ5z1/BDGlal0snuw9jd9Tt8ktRb0os0GBOpi6si/t/upISdbxpKc0F+43OHVC57sxidoSoPatZUS2yNox0EA9meT9jdGFh/W2nyAzTXpu70U/XfTDzuUTOAn152XUKKJxTlNv4vvpPXvnrA/De89+Q8TzI2LMwIM3ftX/0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=I8XQzWYC; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="I8XQzWYC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E71631F00A3E; Wed, 15 Jul 2026 11:16:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784114183; bh=y+9Gybg0clEhzNsBRpzoK0MBhAQIDoHQkN0//Ezgc7E=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=I8XQzWYC2UBGZXjuNJGpuOGAW0Of51hAAW08wp2jTIeBwyFxbK9myOWTW9tsRuKGs v94j/7sWq9yRmtJFnQxr96wSW+PTYDrUqu4eZRssJ6zmLRMuOMmxRzZwiI34GCl0e4 c+jWgV1nKUTYlnRFDJOesIZcsJWvWHAzEu/5seZkY03EE+2AUUxPjkMVyGxyxA79oG 5HeTI9U1EE6gqIhUokMjdp7wuDa1yqO4Azd1EBY+lT1+P+W4BFCcwbopnW6ZEl1okQ xPQDGOzY5kdMnTgZouNheOsMTjnuMFHgNnp2uv95/Jbthqx+z1TBUXaoVzZvZKEyPw Gcm43XiYlpo8Q== From: Sasha Levin To: stable@vger.kernel.org Cc: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Bjorn Helgaas , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Sasha Levin Subject: [PATCH 5.15.y 4/6] PCI: Add kerneldoc for pci_resize_resource() Date: Wed, 15 Jul 2026 07:16:16 -0400 Message-ID: <20260715111618.647249-4-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260715111618.647249-1-sashal@kernel.org> References: <2026071314-tableware-flashback-79cc@gregkh> <20260715111618.647249-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Ilpo Järvinen [ Upstream commit d787018e2dfdc4c1331538e7a8717690d1b7c9b3 ] As pci_resize_resource() is meant to be used also outside of PCI core, document the interface with kerneldoc. Signed-off-by: Ilpo Järvinen Signed-off-by: Bjorn Helgaas Tested-by: Alex Bennée # AVA, AMD GPU Link: https://patch.msgid.link/20251113162628.5946-8-ilpo.jarvinen@linux.intel.com Stable-dep-of: ee7471fe968d ("PCI: Skip Resizable BAR restore on read error") Signed-off-by: Sasha Levin --- drivers/pci/setup-res.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c index 9561365c95b37f..aa66e85a3a4715 100644 --- a/drivers/pci/setup-res.c +++ b/drivers/pci/setup-res.c @@ -422,6 +422,26 @@ void pci_release_resource(struct pci_dev *dev, int resno) } EXPORT_SYMBOL(pci_release_resource); +/** + * pci_resize_resource - reconfigure a Resizable BAR and resources + * @dev: the PCI device + * @resno: index of the BAR to be resized + * @size: new size as defined in the spec (0=1MB, 31=128TB) + * @exclude_bars: a mask of BARs that should not be released + * + * Reconfigure @resno to @size and re-run resource assignment algorithm + * with the new size. + * + * Prior to resize, release @dev resources that share a bridge window with + * @resno. This unpins the bridge window resource to allow changing it. + * + * The caller may prevent releasing a particular BAR by providing + * @exclude_bars mask, but this may result in the resize operation failing + * due to insufficient space. + * + * Return: 0 on success, or negative on error. In case of an error, the + * resources are restored to their original places. + */ int pci_resize_resource(struct pci_dev *dev, int resno, int size, int exclude_bars) { -- 2.53.0